Evolution results from selection acting upon genetic variation within a population. (LS4.B)

Traits that confer an advantage may persist in the population and are called adaptations. (LS4.B, LS4.C)

Inherited characteristics affect the likelihood of an organism's survival and reproduction. (LS4.B, LS4.C)

The amount of genetic variation within a population may affect the likelihood of survival of the population; the less the available diversity, the less likely the population will be able to survive environmental change.

Populations, not individuals, evolve.

Over time, the proportion of individuals with advantageous characteristics may increase (and the proportion with disadvantageous characteristics may decrease) due to their likelihood of surviving and reproducing. (LS4.B, LS4.C)